Treadle controlled toll checking system



March 9,

B. COOPER TREADLE CONTROLLED TOLL CHECKING SYSTEM Filed May 17, 1940 MIND INVENTOR BENJAMIN coo/ 5E BY 21 3mm,

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Patented Mar. 9, 1943 TREADLE CONTROLLED TOLL CHECKING SYSTEM Beniamin Cooper, Jersey City, N. J. Application May 17, 1940, Serial No. 335,717

' 20 Claims. (01. 234-365);

This invention relates to a treadle-controlled toll checking system.

In toll checking systems it is imperative to obtain an accurate count of vehicles passing the point of toll collection. In such a system employing a multi-switch treadle to count the axles vehicles passing over the treadle, false counts may be obtained byshorting of one or more of the switches, as a result of tampering, or by placing a weight on the treadle. It is, therefore, an object of this invention to provide, in a counting system of the character described, controlled by a vehicle actuated multi-switch treadle,

means to count the axles of vehicles even if a switch or certain selected switches are shorted, whereby a true count is obtained notwithstanding tampering with the treadle, as described above.

' plifled in the" construction hereinafter A still further object of this invention is to provide in a counting system of thecharacter described employing a four switch treadle, means to'count the axles treadle,'-even if both the middle switches are shorted; orone or both of the middle switches, and thereafter one of the outside switches are shorted, or if the two outside switches are shorted.

of cars passing over the l Yet a further obiectof this invention is to provide a toll checking system of the character described, having two electric counters .and a four switch treadle, and means to count axles of vehicles on one of the counters when the wheels of the vehicle roll over the treadle in one direction, and means to count axles of vehicles on the-other counter when the wheels of vehicles roll over the treadle in an opposite direction, the system being such as to count the axles on the proper counter responsive to direction of movement of the vehicles, even if one or the other or both of the two outside switches are shorted.

Still a further object of provide in a toll checking system of the character described,- employing a treadle having four switches adapted to be actuated by the wheels of vehicles passing over the treadle, and means to count the axles of vehicles passing over the treadle, signal means adapted to be actuated when either the first or the last switch is first closed or shorted, and then one or both of the middle switches are closed for longer than a predetermined period, said system being then are connected to the plus this invention is to inoperative to count vehicles passing over the I treadle, and means being further provided to record the time when said middle switch or the treadle.

Still another object of this invention is to provide a durable system of the character described, which shall be relatively inexpensive to manufacture, positive in operation, and practical and efiicient to a high degree in use.

Other objects of this invention will in part be obvious and in part hereinafter pointed out.

and arrangement of parts which will described, oh the scope of this application will be indicatedgin the following claims.

In the accompanying drawing, in which is shown one of the various possible embodiments of this invention.

The single figure of the drawing is a diagrammatic representation of a system embodying the invention.

Referring now in detail to the drawing, 9

designates a treadle embedded in a roadway,

gated parallel contacts IA; 2, 2A; 3, 3A and 4, 4A. Said pairs of contacts constitute switches normally open but which may be successively closed and opened as the wheels of a vehicle roll over the treadle. The contacts l,.2, 3 and 4 side of an electric power supply. Preferably, the switches are spaced apart not more than three inches so that as the front and rear wheels of a vehicle roll over the treadle the switches will be closed successively and adjacent switches will be concurrently closed.

The switches are connected by a circuit C so arranged, as will appear hereinafter, that the operation of the treadle in the direction indicated on the drawing, from left to right, will actuate a counter F termed the forward counter, while the wheels of a vehicle rolling over the treadle in the opposite direction will actuate a second counter R, termed the rearward counter.

The forward counter F comprises a relay l0 having a coil 1|, one side of which is connected to the minus power supply. Said relay 70, when energized, is adapted to open a switch arm 19,

engages a fixed contact respect to said fixed contact to, and

which is normally in engagement with a fixed contact 13a.

The rearward counter R comprises a relay 33 having a coil 8|, one end of which is connected to the minus power supply. Said relay, when energized, is adapted to open a switch arm 34 which is normally in engagement with a fixed contact 340.

The circuit C comprises four relays designated by numerals I3, 23, 33 and 43. Relay II has two windings II and I2 connected together and to a minus power supply. Associated with relay I3 are movable switch arms I3, I4, I5, I5 and I3. Switch arm I3 is normally in engagement with a fixed contact Na. and is adapted to be moved by the relay I3 into engagement with a fixed contact I312. The switch arm I4 is normally open, and is adapted to be moved by the relay I3 into engagement with a fixed contact I4a. Switch arms I5, I5 and I3 are normally open, but are adapted to be moved by the relay I3 into engagement with fixed contacts I54, I31: and Isa, respectively. p

Relay 20 is provided with a coil 2I connected at one end to a minus power supply. Associated with said relay are switch arms 22, 23, 24, 25, 23 and 21. Switch arms 22, 24, 25 are normally open and are adapted to be moved by the relay 23 into engagement with fixed contacts 22a, 24a and 25a, respectively. Switch arm 23 normally 23a and is adapted to be opened by the relay 23. Switch arm 23 is normally in engagement with a fixed contact 23a, but is adapted to be opened by the relay 23. Switch arm 21 is normally in engagement with a fixed contact 21!) but is adapted to be moved by the relay 23 out of engagement with 21b, and into engagement with another fixed contact 210.

Relay 33 is provided with a coil 3| connected at one end to the minus power supply. Said relay controls switch arms 32, 33, 34, 35, 33 and 31. Switch arms 32, 34, and 35 are normally open but are adapted to be moved by said relay into engagement with fixed contacts 32a, 34a and 35a, respectively. Switch arm 33 is normally in engagement with a fixed contact 33a and is adapted to be opened by said relay 33. Switch arm 351s normally in engagement with a fixed contact 35a and is adapted to be opened by the relay 30. Switch arm 31 is normally in engagement with a fixed contact 31b but is adapted to be moved out of engagement with respect thereinto engagement with another fixed contact 31a, upon energizing said relay 33.

Relay 43 has two coils 4I and 42. Said coils are interconnected at adjacent ends and connected to the minus power supply. Associated with the relay 43 are switch arms 43, 44, 45, 43 and 48. Switch arms 44, 45, 46 and 43 are normally open but are adapted to be moved by said relay into engagement with fixed contacts 44a. 45a, 45a and 48a. Switch arm 43 is normally in engagement with a fixed contact 43a but is adapted to be moved by said relay out of engagement with respect thereto, and into engagement with another fixed contact 43?).

Said circuit C further comprises a relay 53 provided with a coil 5|, one end which is connected to the minus power supply. Associated with the relay 53 are switch arms 52, 53, 54, 55, 56, 51 and 58. Switch arms 53, 54, 55 and 53 are normally open and are adapted to be moved by said relay into engagement with fixed contacts 53a, 54a, 55a and 58a, respectively. Switch arm 52 normally contacts fixed contact 52a but is adapted to be opened by relay 33. Switch arms 53 and 51 normally engage fixed contacts 53a and 51a, respectively, and are adapted to be opened by the relay when the latter is energized.

Contact la is connected by wire to the switch arm 43 and by wire I23 to the fixed contact 330.

' Contact 2a is connected by wire 23 to switch arm contact 230 is connected by 24 and by wire 25a to the coil 2I. Contact 30 is connected by wire I31 to the switch arm 34 and by wire 43 to the coil 3|. Contact 4a is connected by wire 13 to the switch arm I3 and by wire I22 to the fixed contact 230. Fixed contact I3a is connected by wire 14 to the switch arm 53 and by wire 3 to the switch arm 23.

Fixed contact I3!) is connected by wire 15 to the fixed contact 431: and by wire 13 to the switch arm 55, and also by wire I23 to the switch arm 22. Fixed contact I40, is connected by wire III to the coil II. Fixed contact I3a is connected by wire 1 to the switch arm 25. Switch arm I5 is connected by wire I33 to the coil I2 and by wire I3 to the switch arm 51. Fixed contact I3a is connected by wire I32 to fixed contact 43a and by wire I33 to the switch arm 53. Switch arm I3 is connected by wire I3I to coil H of the forward counter F. Fixed contact Ila is connected by wire 3 to the fixed contact 43a and by wires 23 and I24 to fixed contacts 210 and 31a. Switch arm I3 is connected by wire 23 to switch arm 43.

Fixed contact 220. is connected by wire 13 to the fixed contact 32a. Fixed contact 240 is connected by wire 12 to the switch arm 52. Fixed contact 250 is connected to the plus power supply. Switch arm 23 is connected to plus power supply and by wire 33 to switch arm 21. Fixed wire I33 to the fixed contact 33a. Fixed contact 21b is connected by wire I25 to fixed contact 311: and by wire 33 to switch arm 54. Switch arm 32 is connected by wire 11 to one side of the coil II and by wire 55 to the switch arm 34. Switch arm 33 is connected by wire I23 to the fixed contact 430 and by wire I33 to the fixed contact 51a. Fixed contact 34a is connected by wire 53 to fixed contact 52a. Fixed contact 35a is connected to the plus power supply. Switch arm 35 is connected by wire I23 to the fixed contact 450. Switch arm 33 is connected by wires I34 and HI to the fixed contact 53a. Switch arm 31 is connected to the plus power supply. Switch arm 44 is connected by wire 31 with switch arm 53. Fixed contact 440 is connected by wire I35 to coil 4I. Coil 42 is connected by wire I31 to and by wire 32 to the fixed contact 55a. Switch arm 43 is connected by wire I33 with coil II of counter relay 33.

Fixed contact 540 is connected by wire 33 to switch arm 13 and by wire Hi to the fixed cgntact 55a. Fixed contact 330 is connected to the plus power supply. Fixed contacts 13a and 34a are'interconnected by a wire 33.

When the wheels of a vehicle roll over treadle 3 from left to right, in the direction indicated in the drawing, switch I, IA. will first close energizing relay I3 through coil I2 thereof. The completed circuit is from the plus side of a source of potential through switch I, IA, wire 5, switch 43, 43a, wir I35, switch 51, 51a, wire I3, wire I39, and the coil I2, to the minus side of a source of potential. The energizing circuit for said relay may also be traced through switch I, Ia, wires 5 and I25, closed switch 33, 33a, through wire I23,

the switch arm 45- and thence through wire I83, as before. The energized relay I8 will then close the switches I3, Ia and I8, Ila, and open switch I3, I3a.

When switch 2, 2A is thereafter closed by the wheels of a vehicle, while switch I, IA is still closed, relay 28 will be energized by the com pleted circuit through switch 2, 2A, wires 28 and 28a, and coil 2I. Switches 22, 22a; 24, 24a; 21, 21a and 25, 25a now close and switches 23, 23a; 26, 25a and 21, 21b 'now open. Holding'circuit will now be completed through coil I2 energizing the relay I8 and keeping the said relay energized after switch I, IA of treadle 8 has been opened. This circuit is through switch 25, 25a, wire 1, switch I5, I5a, wire I88 and coil I2, to the minus side of an electrical power supply.

Following through the motion of the wheels over the treadle 9, switch I, IA wlll'open and switch 3, 3A will be closed while switch 2, 2A is still closed. In closing switch 3, 3A, relay 38 will be energized by the circuit from the plus side of a source of electric power through switch 3, 3A, wires I81 and 48, and the coil 3| of relay 38 to the minus side of a source of electric power. Energization of relay 38 closes switches 32, 32a; 34, 34a; 35, 35a and 31, 31a, and opens switches 33, 33a; 36, 38a and 31, 31b. r

In closing switch 3, 3A, and by action of the energized relay 38, a, circuit is completed to hold relay 28 energized even if switch 2, 2A is opened. The completed circuit is through switch 3, 3A,

, wire I81, switch 34, 34a, wire 58, switch 52, 52a,

wire 12, switch 24, 24a, wire 28a and coil 2| of the relay 28.

Still following the passage of the wheels over the treadle 8 in the direction indicated on the drawing, switch 4, 4A will close and switch 2, 2A will open while switch 3, 3A is still closed.

Closing switch], 4A will provide a circuit energizing relay 58, the circuit being through coil 5I of relay 58, wire 11, switch 32,.32a, wire 13, switch 22, 22a, wires I28 and 15, switch I3, I31),

wire 13 and switch 4, 4A, Energizing relay 58 will close switches 53, 53a; 54, 54a; 55, 55a and '58, 58a, and will open switches 52, 52a; 58, 55a

and 51, 51a. By closing switch 55, 55a, another energizing circuit for relay 58 is'completed, the purpose of which will be hereinafter apparent. This second circuit may be traced from minus power supply, through coil H of said rela wires I1 and 85, switch 84, 84a, wire 88, switch 18, 18a, wires 85 and I2I, switch 55, 55a, wires 13 and 15, switch I3, I32) (the relay I8 being energized) wire 19, through closed switch 4, 4a, to plus power supply. In closing switch 58, 58a another circuit will be completed holding the relay I8 energized through coil II of said relay, the circuit being through switch 58, 58a, wire 83, switch I4, I4a; wire H8 and coil II.

Opening switch 52, 52a will break the previously described circuit holding relay 28 energized through switch 3, 3A. Switch 2, 2A has also been opened by the wheel rolling of! the lane, breaking the circuit through said switch and coil 2| of relay 28. Relay 28 is then de-energlzed. Deenergization of relay 28 will allow switches 23, 23a; 25, 28a and 21, 21a to close, will allow switches 22, 22a; 24, 24a; 25, 25a and 21, 21a to open.

De-energization of relay 28 serves to complete a holding circuit for relay 58 in its energized condition, for the purpose hereinafter appeariiig. The second circuit for relay 58 holds said relay energized while switch 22, 22a opens upon of this invention,

through wire 38 to the positive side of a source v of electrical energy.

The further progression of the wheels over the treadle 8 will open switch 3, 3A de-energizing relay 38. Switches 33, 33a; 38, 36a-and 31, 311: will then close, and switches 32, 32a; 34, 34a;

35, 35a and 31, 31a will then open. Opening of switch 3, 3A will energize the directional forward counter F, th completed circuit being through coil H of counter relay 18, wire I8I,

switch I6, I6a, wires I82 and I83, switch 53, 53a,

wires I3I and I 84, switch 35, 36a, wire I88, and switch 28, 26a. Counter relay 18 will then register one count on the counter F. The actuation of counter F will open switch 19, 18a. and hence break the holding circuit for relay 58 through said switch. It will now be noted that relay 58 was held in energized condition until counter F was actuated irrespective of the condition of the last two treadle switches, 3, a count evenif the wheels pass over the treadle at a great rate of speed. De-energized relay 58 will allow switch 58, 58a to open, opening the circuit of coil II of relay I8, thereby de-energizing relay I8. All th switches of the treadle are then opened and all relays are de-energized.

The operation of the circuit a described will be similar were all the steps in the operation 0, the circuit taken in the reverse order. The closing of switches in the sequence 4, 4A; 4, 4A and 3, 3A; 3, 3A and 2, 2A; 2, 2A and I, IA; and I, IA, will operate the backward counter R.

It will now be understood, from the operation that the closure of the switches in the order of I, IA and 2, 2A or 4, 4A and 3,3A

'will determine the directional counter to be acthe backward counter R is locked out to prevent count on the wrong counter. To actuatecounter R, relay 48 must be energized. But by enersizing relays I8 and 28 before closing switch 4, 4A, relay 48 cannot be energized because by energizing relay I8, switch I3, by energizing relay 28, switch 23, 23a is opened. Thus, the two circuits for energizing relay 48 through switches I3, I3a and 23, 23a are thereby opened. Even if the wheel rolls on contact 2, 2A. counter R will nevertheless remain locked out for the following reasons; The closing of treadle switch 4, 4A has completed the circuit through the relay 58. The closing of the circuit through the relay 58 has opened one of the circuits through the relay 28. The opening of the other circuit through the relay 28 by the wheel rolling oil contact 2A asit proceeds from left to right on the treadle de-energizes said relay allowing However. the energize.-

switch 58, SBabefore keeping the circuit 3A; 4, 4A to insure I3a is opened and.

tion if any one of the switches is shorted, whether it be the first switch I, IA; or the inner switches 2, IA or I, 3A, or the last switch I, 4A; and to count the axles passing over the treadle even if both of the inner or middle switches I, IA and 3, 3A are shorted, or one or both of the inner or middle switches are shorted, and thereafter one of the outside switches I, IA or I, IA is shorted, or if only the two outside switches are shorted.

To this end, there is further provided a relay III having a coil III connected at one end to the minus power supply. Associated with said relay are switch arms III, III and III. Said switches are normally open but are adapted to be moved into engagement with fixed contacts IIIa, IIIa and, IIIa, respectively, when the relay III is energized. There is further provided a switch arm I'I, controlled by the relay II, normally in engagement with a fixed contact Ila, but adapted to be opened when said relay is energized. There is also provided a switch arm 41, controlled by the relay II, normally in engagement with a fixed'contact Ila, but adapted to be opened when'said relay is energized. Fixed contact "a is connected to switch arm I! by wire 35 and fixed contact IIa. is connected by wire I to the fixed contact IIa. Switch arm I1 is connected by wire III to the fixed contact IIIa and to the coil III. Switch arm III is connected by wire III to the fixed contact IIa. Fixed contact I53a is connected by wire III to the switch arm II. Switch arm III is connected by wire IIIa to the wires III and III and hence to the switch arm 36, and to the fixed contact IIa. Fixed contact IIIa is' connected to the plus power supply. Switch arm III is connected by wire III to wire I and hence to the fixed contact a, I10 and IIa.

Assume, therefore, that switch I, IA of-treadle I has been closed by tampering, or shorted in any manner. By shorting switch I, IA, relay II will be energized and remain energized throughout the'entire operation of the counter. This device will be operated in the same manner as hereinbeiore described, the axle count being registered on the proper directional counter. Relay II will not be deenergized, however, at the end of the counting operation. The wheels of a vehicle rolling over treadle I in the opposite direction than that indicated will actuate switches I, IA and I, IA to de-energize relay II so that counter R is operated in the normal manner as the wheels continue rolling across the treadle. The closing of switches 4, IA and I, IA energizes relays II and II, respectively, to open both circuits for coil II of relay II.

In the event that treadle switch 4, IA is shorted, relay II will remain energized during the counting operation in the same manner as when switch I, IA was shorted and relay II remained energized. Vehicle axles passing over the treadle will likewise register directional counts'on the counters R and F, as described above.

Assuming now that treadle switch I, IA is shorted, the wheels of the first axle passing over the treadle will be registered on either counter F or counter R, depending upon direction of movement, and wheels of axles subsequently passing over the treadle in either direction, will register on the counter which registered the first count after shorting said treadle switch.

Upon shorting of switch I, IA, relay II will be energized in the manner heretofore described. By the action of energized relay II, switch Ila will close completing a circuit through the coil III of relay III. The completed circuit is through the coil III, wire III, switch 41, Ila, wire II, switch II, IIa, wires I and II, switch I1, I10 and wire II. Energizing relay III will close the switches III, IIIa; III, IIIa. and III, IIIa. Another, or holding circuit is then completed to hold relay III energized through the coil III, switch III, "In, wires III, I and II, switch I1, I10 and wire II. Switch II, IIa may then open when actuated by relay II, leaving relay III still energized by the latter circuit.

As the wheels of a vehicle roll over the treadle "ll, in the direction indicated, relay II will be energized. Switch I, IA being shorted, relay II will again be held energized by the circuit through switch II, IIa, wire I, switch II, IIa, wire III and coil II.

The closing of the switches I, Ia and I, Ia by the wheels of a vehicle will again set up the circuits as hereinbefore described energizing relay II. Relay II, being energized due to the shorted condition of switch I, IA, will hold switch II, III! open. The circuit through switches 26, 26a and II, IIa hereinbefore described to actuate the counter relay" is therefore open. Switch III, II, however, is closed due to action of energized relay III and switch II, No is closed due to action of relay II. Counter relay II is then energized by the circuit through coil II, wire III, switch II, IIa, wire III, wire III, switch II, IIa, wire III, wire IIIa, and switch III, II. The operation of counter relay II will open the circuit, holding relay II energized. De-energizing relay II will open switch II, III: thereby de-energizing counter relay 1I.

It will now be understood that relays II, II, II and III remain energized after the first count on counter F. As vehicles continue moving over the treadle in either direction, each time treadle switch I, IA is closed, thesame counter F will register subsequent counts. The provision of switch III, IIIa connected in parallel across switch II, IIa prevents morethan one count each time wheels on an axle pass over the treadle after the first count which establishes the counter to take the counts.

It relay II were permitted to become de-energized during the operation of the counter, as above described, a double count would result on all wheels of axles passing in an opposite direction over the treadle, subsequent to the wheels of the first axle passing over its treadle in said op-' posite direction. Switch III, IIIa, however, prevents de-energization of said relay, as will now be explained.

Assuming that switch III, IIIa is not in the circuit and switch I, IA of the treadle is shorted energizing relay II, the wheels of a vehicle rolling over the treadle in the direction indicated will actuate the counter I". In actuating counter relay II of counter l", relay II would first be energized, and thereafter de-energized by action of counter II. By energizing relay II,

switch II, IIa will open, permitting relay II to be de -energized.

The front wheels of a vehicle rolling over the treadle I in the opposite direction than that indicated, would close switches 4, 4A and I, IA operating the counter F as herein described. In allowing switch I, IA to open, relay II will be deenergized. closing switch II, IIa. Switch I, IA

- still being closed by the wheel, will hold relay II energized at the same time switch II, IIa. is

again closing. Before switch 3, 3a is opened,

switch 52, 52a has closed, completing a circuit to hold relay 30 energized after switch 3, 3a is open. The circuit holding relay 30 energized is through the coil 3I of relay 30, wire 4!, switch 34, 34a, wire 59, switch 52, 52a, wire 12, switch 24, 24a, wire 29, and shorted switch 2, 2A. Re-

switch 52, 52a and closing switch 53, 53a. Closing switch 53, 5311 will energize the counter relay I3. Opening switch 52, 52a will de-energize relay 3|. Relay 50 is then de-energized by action or counter relay II on switch 13, 13a and by the action of relay 30 opening switch 32, 32a. As the rear wheels of the vehicle then roll onto the treadle 3, switch 3, 3a will then be closed. Relay 30 is thereby energized and switch 4, 4A still held closed by the rear wheels, relay 50 once more, the circuit being through switches 4, 4A; I3, Ilb; 22, 22a and 32, 32a. Switch 53, 53a closes and the counter relay II is actuated for the second time for the same axle. By connecting switch I 53, switch 52, 5211, a double count such as described is avoided. Switch I53, Illa is closed during the entire time that switch 2, 2Ais shorted. As

will hereinafter appear, switch I53, I530 will also .remain closed during a shorted condition of switch 3, 3A of the treadle I and for the similar 31b. Relay I53 is then energized wire 33, switch switch 31, 31a.

purpose of preventing a double e. Assume that treadle switch 3, 3A of treadle 3 is now shorted, the wheels 01 the first axle passing over the treadle will register on either counter 1'" or counter R, depending upon the direction of movement, and wheels of axles subsequently passing over the treadle in either direction will register onthe counter which registered the first count ai'ter shorting said treadle switch. Switch 3, 3A being shorted-relay 30 willbe energized closing swiches 32, 32a; 34, 34a; 35, 35a and 31, 316, and opening switches 33, 33a: 33, 35a and 31,

through the coil III, wire Ill, switch 41, 41a, I'I, Ila, wires 3, 23 and I24, and Energizing relay Ill'will close I53, lilo; I54, Il4a; and "5.15M. A holding circuitfor relay I53 is therebycom- I 53a in parallel with by the circuit tion taken.

will energize count for one either one oi the said pleted through the switch I55, I554, wires I32, I,

23 and I24, and switch 31, 31a. 7

The wheels of a vehicle rolling over the treadle will close the switches I, In. and 2', 2a. Relays I4 and 20" are energized closing their respective switches. Switches I5, I 5:; and 25, 250. complete It energized. Closed switch 24,

- a circuit for holding relay 2! energized by action of energized relay 35, thecircuit being through coil 2I, wire 28a, switch 24, 24a, wires I2 and III, switch I53, I530, wires!" and 5!, switch 34, 34a,

wire m, and switch 1. 30.

Switch 2, as being shorted,1s witch 4, 4A is m IA and then}, 2A allowed 1 closed and switches I to open. Relays ".24 and 33 remainenergized. Closing switch 4, 4A ergized relay II will lay 24 is now held energized through switch I 53,

Illa as previously described. Relay 54 closes switch 53, 53a energizing counter relay I 4. Relay II is then ie-energized by action or counter relay II and the opening of switch 4. 4A. De-ener will energize relay ll. ,En

p n switch '2, "a, b

circuit for holding relay 24a completes on the direction oi travel. I: switch 2, 2A is first energized, opening switch 23, 23a. Relay is then tie-energized and remains tie-energized until-the Relay Ilis then deener wheels of a vehicle roll over treadle 9 in either I direction and close the switch 4, 4A.

It will be noted that the shorting of switches 2, 2A or 3, 3A of the treadle 9 will, after the first set of wheels of a vehicle roll over the treadle,

hold the relays I0, 20 and 30, or the relays-40 30 and 20, energized, dependent upon the direclays energized, the circuits set up thereby are the same as though switches 3, 3A; 2, 2A and the above combination of switches is the same as described, counter F being actuated at all bination of switches.

. Ii'switch 2, 2A is first shorted and then switch I, IA, the wheels of a vehicle will actuate the counter F. After the actuation of the counter F, relay 30 will be held energized as hereinbeiore described. The counter F, condition, will be actuated regardless of the di rection the first vehicle passes over the treadle after the shorting condition described. In like 3A and then switch 4, 4A are shorted. Relay 20 will remain energized after the first actuation In the two-switch combinations last mentioned, the respective counters will be actuated regardless of the direction'in which the first axle passes over the treadle 3 shorting switches 2, 2A and 3, 3A-will bring about operating conditions similar to that when .The first axle passing the shorting condition occurs, will determine the passing over the treadle.

If switches I, IA and 4, 4A are shorted, the Q device will still register the axle count on the proper directional I, IA and 4, 4A will energize relays I0 and 45, respeetively.'- The wheels or a vehicle will'then close either switch 2-, 2A orswitch 3, 3A first depending counting operation is completed by counter F;

first. relay 391s energised, opening switch 33, 33a. until the counting operation is completed by, counter R.

II! one of the outside treadleswitches is first shorted and one or both of the middle treadle switches'are thereafter shorted, the system will I be inoperative to cotmt on either counter.

By holding the aforementioned re-' then switch I, IA were shorted, or switches 2,-2A; 3, 3A and then switch 4, 4A. The operation for times for the first combination oi switches while. counter R will be actuated for thesecond com-funder this shortingactuated "when switch 1 2A is first shorted and then R will be actuated and relay 33 will remain energized aiter'the, first axle count.

after the shorting condition.

switches were shorted alone.'

over the treadie 4, after counter. shorting the switches Ii switch 3, 3A is closed,

, I15 is a normally open switch arm opening switch 36, 36a.

Thus assuming that treadle switch I, IA is first shorted and then the treadle switch 2, 2A, shorting switch I, IA will energize relay I0, opening switch I1, I1a; shorting switch 2, 2A will energize relay 20 opening switch 26, 26a. Switch I1, l1a being open, the shorting of treadle switch 2, 2A will not energize relay I50 as previously described. Relay 20, in holding switch 26, 26a open, will prevent the actuation of the counter F, as one of the energizing circuits for the counter relay will remain open. The other circuit for energizing counter relay 10 is through the switch I54, I54a. controlled by relay I50. Relay I50 not being energized, will allow switch I54, I54a to remain open, again preventing counter relay 10 from functioning. A count therefore cannot be made.

If switch I, IA is first shorted and then switch 3, 3A, counter relay 10 will again be prevented from functioning. The action of switch I, IA will again energize relay I0, opening switch I1, I1a. Shorting switch 3, 3A will energize relay 00, Relay I50 will not be energized due to open switch :I1, I11: and counter relay 10 will not be energized due to the open switches 36, 36a and I54, I54a. Relay 30, held energized by shorting of switch 0, 3A will hold relay 20 in an energized condition even after switch 2, 2A is allowed to open. Holding relay 20 energized would be analagous to shorting oi switch 2, 2A. shorting switch I, IA first, and then switches 2, 2A and 0, 2A, will also prevent counter relay 10 from functioning.

In like manner counter relay 80 will not function when switch 4, 4A is first shorted and then either or both of the switches 0, 3A or 2, 2A of treadle 9 are shorted.

Means is provided, however, to produce a signal, such as a light, when one or the other of the outside treadle switches is first closed, and one or both of the middle switches are then shorted for more than a predetermined period, whereby to give notice that the system is not operative to count passage of axles of vehicles over the treadle, said signal means being so arranged as to stop operation when the closed middle treadle switch or switches, or the closed outside switch, is again opened so that the warning signal stops operating so that the system is again in condition to count vehicle axles. Means is also provided to make a printed record of the time when the middle switch or switches have been closed for longer than a predetermined period after shorting one o! the outside switches, and thus rendering the system inoperative to record passage of axles of vehicles over the treadle, and to make a second printed record or the time when the closed middle switch or switches, or the closed outside switch opens to render the system again operative to count axles of vehicles passing over the treadle.

To this end, there is provided a pair of relays I and I10. Relay I15 has a coil I16 connected at one end to a plus power supply. Relay I10 is provided with a coil "I connected at one end to a plus power supply. Associated with the relay I11 adapted to be moved into engagement with a fixed contact I11a when relay I15 is energized. Associated with the relay I10 are switch arms I10, I14 and I12. Switch arms I13 and I14 are normally open but are adapted to be moved into engagement with fixed contacts I13a, I14a, respectively, when relay I10 is energized. Switch arm I12 is normally in engagement with a fixed contact "211 and is adapted to be moved by the relay I10 out of engagement with said fixed contact and into engagement with a fixed contact I12b.

There is further provided a time delay relay 60 having a coil 6I connected at one end to a minus power supply. Said time delay relay controls switch arms I6I and I62. Switch arm I6I is normally open but is adapted to be moved into engagement with a fixed contact I6Ia when the time delay relay 60 is energized. Switch arm I62 is normally in engagement with a fixed contact I621) and is adapted to be moved out of engagement with respect thereto, and into engagement with a fixed contact I62a. The switch arm I6I is connected by wire I63 with signal lights or other signals I64, connected to the minus power supply. The relay I60 has furthermore associated therewith, a switch arm I66 normally in engagement with a fixed contact I56a and adapted to be opened when said relay is energized.

There is further provided a time stamp P having a printing solenoid I00 provided with a coil IOI connected at one end to a plus power supply. The solenoid I00 controls a printing platen I10 connected to a switch arm I02. When the printing plate is in normal position, the switch arm I02 contacts the fixed contact I02b. When the platen I1! is moved to a printing position, the switch arm I02 moves out of engagement with the fixed contact I02b and into engagement with a fixed contact I02a.

Switch arm I56 is connected by wire III to wire 20 and hence to the switch arms I0 and 40. Fixed contact I56a is connected by wire I34 to the coil 6| oi the relay 60. Fixed contact I6Ia is connected to a plus power supply. Fixed contact I62a is connected by wire I66 to fixed contact I12a and by wire I66 to switch arm I10, and by wire I60 to switch arm I02. Switch arm I62 is connected to minus power supply. Fixed contact I621) is connected by wire I60 to fixed contact I12b. Switch arm I12 is connected by wire I00 to coil I16 of relay I15. Fixed contact I10a is connected by wire I04 to the coil HI and by wire I61 to fixed contact I02a. Fixed contact I14a is connected to minus power supply. Switch arm I14 is connected by wire I60 to the fixed contact I02b. Switch arm I11 is connected by wire I10 to coil III. Fixed contact I11a is connected to minus power supply.

The platen I19 is adapted to push paper and printing ribbon against date and time wheels I03, as in the usual time stamp.

The operation of the signal and printing means, when an outside treadle switch is first shorted and one or both of the middle treadle switches are then shorted, will now be described.

Under ordinary operating conditions, delayed time relay 00 will not be energized long enough to operate, nor will the delayed time relay 60 be energized if either or both switches 2, 2A and 3, 3A are first shorted. shorting either of these two switches will energize relay I50, thereby opening switch I66, I66a.

When switch I, IA and then switch 2, 2A are shorted, relay 60 will be energized by the circuit through coil 6I, wire I04, switch I56, I56a, wires III and 20, switch I0, I0a, wires 0, 20 and I24, switch 21, 21a, and wire 00. Should the delayed time relay 60 be energized for a longer period than the predetermined time set, switches I6I, I6Ia and I62, I62a will be closed, and switch I62, I621: allowed to open.

In closing switch I6I, I6Ia the signal I64 is actuated, the circuit being through the wire I63 and signal I64. Switch I02, I62a in closing will actuate the printing solenoid I80 causing a record to be made of the time of such shorted condition. Relay I15 is energized by the circuit through the coil I16, wire I83, switch I12, I12a, wire I66 and switch I62, 521;. Relay I15 will close switch I11, I11a energizing the printing solenoid I80, the circuit being through wire I18 and coil I6I. The platen I19 will then be raised and contact the time and date wheels I83, paper and a printing ribbon being interposed, recording the time of such operation. I

Platen I19 in its printing position will close switch I82, I82a and open switch I82, I82b. Relay I10 will then be energized by the circuit through coil I1I, wires I84 and I61, switch I82, I82a, wires I69, I65 and I66, and switch I62, I620. Energized relay I10 will close switch I13, I13a, closing another circuit through coil "I to hold relay I10 energized when switch I82, I82a opens, and before switch I 82, I821) closes. The completed circuit is through the coil I1 I, wire I84, switch I13, I13a, wires I65 and I68, and switch I82, I62a.

Energizing relay I10 will open switch I12, HM and close switches I12, I12b and I14, I14a. Opening switch I12, I12a will open the circuit energizing relay I15. Relay I15 de-energized, switch I11, I 11a opens de-energizing the printing solenoid I80. Platen I19 will then return to its initial position opening switch I82, I82a and closing switch I82, I82b. Switch I82, I82b completes a circuit for holding relay I10 energized, the circuit being through the coil I1I, wire I80, switch I13, I13a, wire I69, switch I82, I82b, wire I88 and switch I14, I14a.

Relay I10 will then remain energized until delayed time relay 60 is de-energized. Visual signal I64 will also remain operated until the said relay is deenergized.

The operation of the printer to record the time when the shorting clears will now be described.

Assum that the shorted condition of switch 2, 2A is cleared, relay 20 is then tie-energized opening switch 21, 21a. Delayed time relay 60 is then (la-energized. By opening switch 2, 2A, the circuit will again be operative as hereinbefore described.

De-energized relay 60 will then allow switches I8I, I8Ia and I62, I82a. to open, and switch I62, H521) to close. Opening switch I8I, I8Ia will open the circuit of signal I64 and make the same inoperative. By closing switch I62, I 62b the printing solenoid will again be energized.

Relay us will be energized by the circuit through coil I16, wire I83, switch I12, I12b, wire I60 and switch I62, I62b. Switch I11, I11a closes, energizing printing solenoid I80. Platen I19, in moving upward,- opens switch I82, I82b, thereby de-energizing relay I10. Relay I10, being de-energized, will allow switch I12, I12b to open, thereby de-energizing relay I15. Switch I11, I11a opens de-energizing the printing solenoid I80, allowing platen I18 to return to its initial position.

If switches 4, 4A and 3, 8A are shorted for any length of time beyond the time set on delayed time relay 60, the said relay will be energized by the circuit through coil 6I, wire I34, switch I88, I56a, wires H3 and 28, switch 48, 48a, wires 8, 29 and I24, and switch 31, 31a.

If switches I, IA and then switch 3, 3A are shorted, the delayed time relay 60 will again be energized. The circuit then would be through wire I34, switch I56, I56a, wires H3 and 28, switch I8, I8a, wires 8, 29 and I24 and switch 31, 31a, 78

Similarly, should switch 4, 4A and then switch 2, 2A be shorted, delayed time relay 60 will be energized through switch 48, 48a, as aforesaid, wires 8, 29 and I24, and then through switch 21, 21a. Opening switch 3, 3A or switch 2, 2A will dHllelgiZe the delayed time relay 60.

Should switch I, IA be shorted, and then switches 2, 2A and 3, 3A; or switch 4, 4A and then switches 2, 2A and 3, 3A, delayed time relay will again be energized. The said relay will be released when both switchesZ, 2A and 3, 3A are opened.

Throughout the specification and claims, the word "bridged" is used to mean shorted and/0r closed. Thus a bridged switch" is one capable of influencing the operation of th disclosed circult.

Throughout the specification the term outer" or outside" switches refers to switches I, IA and 4, 4A, and the terms inner and inside switches, refer to the switches 2, 2A and 3, 3A.

It will thus be seen that there is provided a system in which the several objects of this invention are achieved and which is well adapted to meet the conditions of practical use.

As variou possible embodiments might be made of the above invention and as various changes might be made in the embodiment set forth, it is to be understood that all matters herein set forth or shown in the accompanying drawing are to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. In combination with a multi-switch treadle, comprising a set of more than two switches adapted to be closed in sequential order by the wheels of a vehicle rolling thereover, a forward counter and a backward counter, a circuit connecting both counters with said switches, including means to actuate the forward counter when said switches are closed sequentially in on direction and adjacent switches are closed concurrently, and to actuate the backward counter when said switches are sequentially closed in anopposite direction and adjacent switches are closed concurrently, said circuit including means to make a directional count on the forward counter upon sequentially actuating all the switches in the first direction and adjacent switches concurrent- /ly, while the first switch is bridged, and also means to make a directional count on the backward counter upon sequentially actuating all switches in an opposite direction, and adjacent switches concurrently, while the last switch is bridged.

2. In combination with a multi-switch treadle, comprising aset of more than two switches adapted to be closed in sequential order by the wheels of a vehicle rolling thereover, a forward counter and a backward counter, a circuit connecting both counters with said switches, including means to actuate the forward counter when said switches are closed sequentially in one direction and ad- Jacent switches are closed concurrently, and to actuate the backward counter when said switches are sequentially closed in an opposite direction and adjacent switches are closed concurrently, said circuit including means to actuate the proper directional counter even if the first switch of said set is bridged, and also if the last switch of said set is bridged, before and held bridgedduring, the sequential operation of the remaining switches of said set, and also if both the first and the last switches of said set are bridged before, and held bridged, during the sequential operation of all the switches of said set.

3. In combination with a multi-switch treadle, comprising a set of more than two switches adapted to be closed in sequential order by the wheels of a vehicle rolling thereover, a forward counter and a backward counter, a circuit connecting both counters with said switches, including means to actuate the forward counter when said switches are closed sequentially in one direction and adjaoent switches are closed concurrently, and to actuate the backward counter when said switches are sequentially closed in an opposite direction and adjacent switches are closed concurrently, said circuit including means to actuate th proper directional counter even if the first switch of said set is bridged, and also if the last switch of said set is bridged, before and held bridged during, the sequential operation of the remaining switches of said set, and also if both the first and the last switches of said set are bridged before, and held bridged during, the sequential operation of all the switches of said set, and means to actuate one of said counters even if any of the switches of said set, other than the first or last switches of said-set, is bridged before, and held bridged during, the sequential actuation of all the switches of said set.

4. In combination with a multi-switch treadle, comprising a set of more than two switches adapted to be closed in sequential order by the wheels of a vehicle rolling thereover, a forward counter and a backward counter, a circuit connecting both counters with said switches, including means to actuate the forward counter when said switches are closed sequentially in one direction and adjacent switches are closed concurrently, and to actuate the backward counter when said switches are sequentially closed in an opposite direction and adjacent switches are closed concurrently, said circuit including means to actuate the proper directional counter even if the first switch of said set is bridged, and also if the last switch of said set is bridged, before and held bridged during, the sequentialoperation of the of the outside switches of said set is bridged before, and held bridged during, the sequential operation of all the switches of said set.

6. In combination with a set of more than two switches adapted to be actuated in sequential order, a pair of impulse registering devices, a circuit interconnecting said switches with said registering devices, including means for actuating one of said devices by the sequential operation of all of said switches and concurrent operation of adjacent switches in one direction, and for actuating theother of said devices by the sequential operation of all of said switches and the concurrent operation of adjacent switches in the reverse direction, said circuit having means for actuating said devices responsive to the direction of sequential operation of said switches even if one of the outside switches of said set is bridged before, and held bridged during, the sequential operation of all the switches of said set, and also if both the outside switches of said set are bridged before, and held bridged during, the sequential operation of all the switches of said set.

7. In combination with a set of more than two switches adapted to be actuated in sequential order, a pair of impulse registering devices, a circult interconnecting said switches with said registering devices, including means for actuating one of said devices by the sequential operation remaining switches oi said set, and also if both the first and last switches of said set are bridged before, and'held bridged during, the sequential operation of all the switches of said'set, means to actuate one of said counters even if any of the switches of said set, other than the first or last switches of said set, is bridged before, and held bridged during, the sequential actuation of all the switches of said set, and means to actuate one of said counters upon passage of the wheels over the treadle in either direction even if any of the switches of said set other than the outside switches is first bridged and held bridged, and thereafter one of the outside switches is bridged and held bridged, before and during the sequential operation of all the switches of said set.

5. In combination with a set of more than two switches adapted to be actuated in sequential order, a pair of impulse registering devices, a circuit interconnecting said switches with said registering devices, including means for actuating one of said devices by the'sequential operation of all 0! said switches and concurrent operation of adjacent switches in one direction, and for actuating the other of said devices by the sequential operation of all of said switches and the concurrent operation of adjacent switches in the reverse direction, said circuit having means for actuating said devices responsive to the direction of sequential operation of said switches even if one of all of said switches and concurrent operation of adjacent switches in one direction, and for actuating the other of said devices by the sequential operation of all of said switches and the concurrent operation oi adjacent switches in the reverse direction, said circuit including means to prevent actuation 0! said devices when one of the outside switches of said set is first bridged and maintained bridged, and then any of the switches other than the outside switches is thereafter bridged and maintained bridged, before and during the sequential actuation of all the switches of said set.

8. In combination with a set of more than two switches adapted to be actuated in sequential order, a pair of impulse registering devices, a circuit interconnecting said switches with said reg-j prevent actuation of said devices when one of the outside switches of said set is first bridged and maintained bridged, and then any of the switches other than the outside switches is thereafter bridged and maintained bridged, before and during the sequential actuation of all the switches of said set, and signal means to indicate when any oi the switches other than the outside switches are bridgedand held bridged after an outside switch has been bridged and held bridged.

9. In combination with a set of more than two switches adapted to be actuated in sequential order, a pair of impulse registering devices, a circuit interconnecting said switches with said registering devices, including means for actuating one of said devices by the sequential operation of all of said switches and concurrent operation of adjacent switches in one direction, and for actuating the other of said devices by the sequential operation of all of said switches and the concurrent operation of adjacent switches in the rethird switch, and also if both the second and a verse direction, said circuit including means to prevent actuating of said devices when one of the outside switches of said set is first bridged and maintained bridged, and then any of the switches other than the outside switches is thereafter bridged and maintained bridged, before and during the sequential actuation of all the switches of said set, signal means to indicate when any of the switches other than the outside switches are bridged and held bridged after an outside switch has been bridged and held bridged, means to record the time when said signal means hasbegun operating, and means to render the signal means inoperative when the switches other than the outside switches of said set which have been bridged and held bridged, are restored to initial condition.

10. In combination with a multi-switch treadle, comprising four switches, a forward counter and a backward counter, a circuit connecting both counters with said switches, including means to actuate the forward counter when all of said switchesare closed sequentially in one direction, I

and adjacent switches are closed concurrently,

and to actuate the backward counter when all of said switches are actuated sequentially in the opposite direction and adjacent switches are.

closed concurrently, said circuit including means to actuate the proper directional counter even if the first switch, and also if the fourth switch of said treadle is bridged and held bridged before and during the sequential operation of all the switches of said treadle.

11. In combination with a multi-switch treadle comprising four switches, a forward counter and third switches are bridged and held bridged before and during the sequential actuation of all the switches of said treadle,

13. In combination with a multi-switch treadle comprising four switches a forward counter and a backward counter, a circuit connecting both counters with said switches, including means to actuate the forward counter when all of said switches are closed sequentially in one direction, and adjacent switches are closed concurrently, and to actuate the backward counter when all of said switches are actuated sequentially in the opposite direction and adjacent switches are clos'ed concurrently, said circuit including means to actuate the proper directional counter even if the first switch, and also if the fourth switch of said treadle is bridged and held bridged before and during the sequential operation of all the switches of said treadle, and also if both the flrst and the fourth switches are bridged and held bridged before and during the sequential actuation of all the switches of said treadle, means to actuate one of said counters upon bridging and holding'bridged the second switch, and also upon bridging and holding bridged the third switch, and also if both the second and third switches are bridged and held bridged before and .during the sequential actuation of all the switches of said treadle, and means to actuate one of said counters upon passage of wheels over the treadle in either direction even if the second switch ofsaid treadle is first bridged and held bridged, and thereafter the first switch is bridged a backward counter, a circuit interconnecting both counters with said switches, including means to actuate the forward counter whenall .of said switches are closed sequentially in one direction, and adjacent switches are closed conand held bridged before and during the sequential operation of all the switches of said treadle. 14. In combination with a'multi-switch treadle comprising four switches, a forward counter and a backward,-a circuit connecting both counters currently, and to actuate the backward counter when all of said switches are actuated sequentially in the opposite direction switches are closed concurrently, said circuit in- 'cluding means to actuate the proper directional with said switches, including means to actuate the forward counter when all of said switches are closed sequentially in one direction, and adand adjacent countereven ii the first switch, and also if the fourth switch of-said treadle is bridged and held 'jacent switches are closedconcurrently, and to actuate the backward counter when all of said switches are actuated sequentially in the opposite direction'and adjacent switches are closedconcurrently, said circuit including means to prevent actuation of said counters if one of the outside switches of said treadle is first bridged and held bridged and then one of the inside switches of said treadle is bridged and maintained bridged. 15. In combination with a multi-switch treadle comprising four switches, a forward counter and a backward counter, a circuit connecting both counters with said switches, including means to actuate the forward counter when all of said switches are closed sequentially in onedirection,

" and adjacent switches are closed concurrently,

and to actuate the backward counter when all of said switches are actuated sequentially in the opposite direction and adjacent switches are closed concurrently, said circuit including means to actuate the proper directional counter even if the first switch, and also if the fourth switch of said treadle is bridged and held bridged before and during the sequential operation of all the switches of said treadle, and also if both the first and the fourth switches are bridged and held bridged before and during the sequential actuation of all the switches of said treadle, and

means to actuate one of said counters upon bridging and holding bridged the second switch,

and also upon bridging and holding bridged the and to actuate the backward counter when all of said switches are actuated sequentially in the opposite direction and adjacent switches are closed concurrently, said circuit including means to prevent actuation of said counters if one of the outside switches of said treadle is first I bridged and held bridged and then one of the inside switches of said treadle is bridged and maintained bridged, and signal means to indicate when an inside switch is bridged and held bridged after an outside switch has been bridged and maintained bridged.

16. In combination with a multi-switch treadle comprising four switches, a forward counter and a backward counter, a'circuit connecting both counters with said switches, including means to actuate the forward counter when all of said switches are closed sequentially in one direction, and adjacent switches are closed concurrently, and to actuate the backward counter when all of said switches are actuated sequentially in the opposite direction and adjacent switches are closed concurrently, said circuit including means to prevent actuation of said counters if one of the outside switches of said treadle is first bridged and held bridged and then one of the inside switches of said treadle is bridged and maintained bridged, signal means to indicate when an inside switch is bridged and held bridged after an outside switch has been bridged and maintained bridged, and means to render the signal inoperative when said circuit again actuates said counters.

17. In combination with a multi-switch treadle comprising four switches, a forward counter and a backward counter, a circuit connecting both counters with said switches, including means to actuate the forward counter when all of said switches are closed sequentially in one direction, and adjacent switches are closed concurrently, and to actuate the backward counter when all of said switches are actuated sequentially in the opposite direction and adjacent switches are closed concurrently, said circuit including means to actuate the proper directional counter even if the first switch, and also if the fourth switch of said treadle is bridged and held bridged before and during the sequential operation of all the switches of said treadle, and also if both the first and the fourth switches are bridged and held bridged before and during the sequential actuation of all the switches of said treadle, and means to actuateone of said counters upon bridging and holding bridged the second switch, and also upon bridging and'holding bridged the third switch, and also if both the second and third switches are bridged and held bridged before and during the sequential actuation of all the switches of said treadle, said circuit including means to prevent double actuation of said counters when the second switch, and also if the third switch is bridged and held bridged before and during the sequential operation of all the switches of said treadle.

18. In combination with a set of more than two switches adapted to be actuated in sequential order, a pair of impulse registering devices, a circuit interconnecting said switches with said registering devices, including means to actuate one of said devices by the sequential operation of all of said switches and concurrent operation of adjacent switches in one direction, and actuating the other of said devices by the sequential operation of all of said switches and concurrent actuation of adjacent switches in a reverse direction, said circuit including means to actuate one of said devices when some of said switches are bridged before, and held bridged during the sequential actuation of all the switches of said set.

19. In combination with a set of more than two switches adapted to be actuated in sequential order, a pair of impulse registering devices, a circuit interconnecting said switches with said registering devices, including means to actuate one of said devices by the sequential operation of all of said switches and concurrent operation of adjacent switches in one direction, and actuating the other of said devices by the sequential operation of all of said switches and concurrent actuation of adjacent switches in a reverse direction, said circuit including means to actuate one of said devices when some of said switches are bridged before, and held bridged during the sequential actuation of all the switches of said set, means included in said circuit to prevent actuation of said devices when other switches of said set are bridged and held bridged, signal means, and means to operate said signal means when said circuit becomes inoperative to actuate said devices.

20. In combination with a set of more than two switches adapted to be actuated in sequential order, a pair of impulse registering devices, a circuit interconnecting said switches with said registering devices, including means to actuate one of said devices by the sequential operation of all of said switches and concurrent operation of adjacent switches in one direction, and actuating the other of said devices by the sequential operation of all of said switches and concurrent actuation of adjacent switches in a reverse direction, said circuit including means to actuate one of said devices when some of said switches are bridged before, and held bridged during the sequential actuation of all the switches of said set, means included in said circuit to prevent actuation of said devices when other switches of said set are bridged and held bridged, signal means, means to operate said signal means when said circuit becomes inoperative to actuate said devices, and means controlled by said circuit to record the time when said signal means becomes operative and again when said signal means becomes inoperative.

BENJAMIN COOPER. 

